Testing device for cylinders



Julyzs', 1931; A, STORM 1,816,061

TESTING DEVICE FOR CYLINDERS Filed April 7. 1928 Adajzrfi 270112] Z j .4; WW4? 54g? Patented July 1931 U iTE o, s ATEs PATENT OFFICE AnoLrlz-r sToR-M, onnmnnarotis, ivrinnnsoraassrenon TO STORM MANUFACTUR- ING- CO IN (3., OF MINNEAPOLIS, MINNESOTA, A CORPORATION OF MINNESOTA TESTING DEVICE FOR CYLINDERS Application filed April '2', 1928'. Serial No. 268,179.

'- "My invention relates to a testingdevice for cylinders and, more especially, engine cylinders. Cylinder gaugesare in common use for indicating tapered, out of round or is scored'cylinders, but they will not indicate be reground or rebored to make the same true Lil whether or not the walls of a cylinder are at rightangles to the-planeofthe top of a cylinder block. Thistesting of a cylinder wall is highly important in order to determine the size to regrind or rebore a cylinder with its axis at" right angles to the plane of the cylinder block.

The invention provides a square for use in testing a cylinder, the readings are taken longitudinally thereof at a plurality of circumferent-ially spaced points. After these readings have been noted, it is an easy matter to determine the size to which a. cylinder must and with its axis at right angles to the top of the cylinder block.

To the above end, generally stated, the invention consists of the novel construction and 9 arrangement of parts hereinafter described and defined in the claims.

In the accompanying drawings, which illustrate the invention, like characters indicate like parts throughout the several views.

Referring to the drawings:

Fig. 1 isa fragmentaryplan View showing a cylinder block and one of its cylinders to which is applied the square and a co-operating cylinder gauge;

Fig. 2 is a view partly in side elevation and partly in section taken on the line 2-2 of Fig. 3 is a fragmentary bottom plan view of the square with some parts broken away, and also. diametrically illustrating, by means of broken lines, thecylinder shown in Figs. 1 and 2.

The numeral 4 indicates an engine cylinder lock and the numeral 5 indicates one of the cylinders thereof.

point in relation to the hand 11. The contact stud 12 projects radially from the block 9 and works through a seat therefor in the sled 6 .betweenthe contact points 7. Said block 9 has a double spring action making the same self-centering. A stop flange 1 1 on the contact stud 12is arranged to engage the sled 6 and limit the movement of the block 9 away from the contact point 7 thereof. The

rod 13 is axially aligned with the contact stud 12 and is held in different axial adjustments in respect thereto by a nut 15 applied to a split yieldingly projected stem 16 in the block 9. f

Referring now indetail to the invention, the square comprises an elongated head 17 and a blade 18 perpendicular thereto. Said head 17 has a large central work opening 19 and the under face of said head is flat and smooth and on the top thereof is a re-inforc ing rib 20. The head 17 is adapted to rest on the top of the cylinder block 4, span the cylinder 5 with the work opening 19 thereover. The two side members of the head 17 are arched at 21 to afford finger holes by which the square may be lifted to and from the cylinder'block 4. V,

The blade 18 is perpendicular to the under or cylinder-block-engaging face of the head 17, is integrally formed with said head at one end thereof and of such length as to extend through the cylinder 5. Said blade 18, in cross section, is in the form of a chan nel having a narrow bottom with diverging sides that progressively decrease from the head 17. The narrow bottom of the channel in the blade 18 affords a flat way 22 for the rod 13 of the cylinder gauge, and which way extends at right angles to the under or cylinder-block-enga ing face of the head 17.

i on the top of said block withthe blade 18 extending into the cylinder 5 with the, two contact pins 23 engagingthe walls of said cylinder. The cylinder gauge is then inserted' through the work opening 19 and into the cylinder'5and its rod '13 'endwise adjusted-in respect to themontaetStud-lQ, so that the oute'rendof said rodengages the way'22 perpendicular thereto and thecontact stud 12 engages the wall of the cylinder 5 at a diametricallyopposite point from-the way 22. Thecontact-points 7 of'thesled'tl are yieldingly held iii-engagement with the sects its way, including the axis of said cylinder.

2. The structure defined in claim 1 in V which the head is provided with a workopening having a width greater than that between the way and the diametrically opposite side of the cylinder. 7

3. A'device of the class described including a head having a central work opening and positioning face surrounding said opening andarranged to engage a" cylinder block atthetopthereof and over one of its cylinders, saidhead being provided with a flat way perpendicular to said face and arranged to extend into said cylinder, said device also having apairof positioning contacts arranged to engage the wall of the cylinderatr circumferentially spaced points and position the device'with the plane which is perpendicular to and bisects'its wa-y, including ther'axis of said cylinder. J

In testimonywhereof I 'affix' my signature.

' ADOLPH STORM.

walls of'the cylinder 5, one on ea'ch'side of thecontact stud'l2. The operator then turns the dial'lO to'bring-its zero point into registration with theha-nd 11.

With thecylinder gauge thus adjusted the lOtlliliS' endwise yieldingly pressed against tli-e-way: 22 andthesled 6 yieldingl-y pressed from: said way into contactwith the walls of the cylinder "5. With the cylinder gauge thus mounted. the operator-moves the sled 6 longitudinally in the cylinder 5 by ineans'of the handle 8. In case the wall of the cylinder 5'is out of true, either minus'or plus,

I the sledB will moveeither towardor from the block 9 and thereby' operate the hand 11 and indicate the number of thousandths the "wall out of true either minus or plus.

After the necessary readings have been taken, the operator turns the square: and cylinder gauge circumferentially in 'the'cylini der 5 and takes further readings. It is usually custoniary to-test cylinders on quarters in determining the size they areto be reground'or, rebored.

The above described square, while extremely'sirnpleand of small cost of manufacture, has,- in actual usage, proven highly. efiicient for the purpose had in View.

What I claim is: v V

1. A device of the class describedincluding, a head having a positioning face arranged to-engag'e a cylinder block atthe top 7 thereofand loosely support the device there on, v sald head being ,prov1ded wlth a long fixed flatway perpendicular to'said face and arrangedto extend into one of the cylinders of said black. said device also having a pair offlpositioning contacts arrangedto engage the wall of the cylinder at'circumferentially spacedpoints and position the device with the plane which is perpendicular to and bi- 

